RT Journal Article SR Electronic T1 Pulse oximetry in primary care JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 497 OP 497 DO 10.3399/bjgp11X588394 VO 61 IS 589 A1 Chris Gunstone YR 2011 UL http://bjgp.org/content/61/589/497.1.abstract AB